How a lighting plot gets from a blank floor plan to a lit set

Every lighting job here begins with a measured floor plan and a conversation about what the set has to do. A news desk that sits still for forty minutes asks different questions from an interview set where two guests may lean in and out of frame. Before Priya Nair draws a single fixture, we find out where the cameras will stand, how high the ceiling grid is, what the walls and desk are made of, and how much power the room can safely give us.

We also ask who will be on the set. Skin tones, glasses, bald heads and shiny desk surfaces all change how a plot behaves, and it is far cheaper to learn that on paper than with a ladder in the studio. If the room has windows, we note the direction and whether blinds are fitted, because daylight changes through a long afternoon programme.

From this we draft a first plot on a single sheet: fixture positions, beam directions, and the circuits each one will need. It is deliberately plain, so the client can read it without a technical background and tell us what we have missed.

• Camera positions and lens choices
• Ceiling height and rigging points
• Desk and wall finishes that reflect light
• Available power and spare circuits

Priya lays the plot down in layers, and we talk about it in the same order on site. The key light comes first, because it gives the presenter a clear, flattering face from the camera side. Then the fill, set softer so shadows stay readable without looking flat. Then the backlight, which lifts people off the background and gives the picture its depth.

Only after those three do we think about the set itself: background washes, desk edge lighting and any practical lamps that appear in shot. Treating the set as the last layer stops it from competing with the people, which is the most common reason a studio picture feels busy.

Each layer is drawn on its own so it can be switched on and judged alone. That habit pays off in commissioning, when we can turn one layer off and see at once which fixture is responsible for a stray shadow or a hot spot on a shiny surface.

LED panels run cooler than the older tungsten units, draw less power and keep their colour steady across a dimming range, which matters in a small studio where heat and air handling are already stretched. But not every LED fixture is suitable for television. Cheap units can flicker on camera at certain shutter settings, or shift colour as they dim.

So before a fixture goes on a plot we test it with the camera it will actually be used with. We look at the picture on a monitor at the shutter speeds the gallery will use, and we step through the dimming range watching for banding or a green or magenta cast creeping in at the low end.

We also check the fixtures can be controlled the way the studio needs. A set that will be reconfigured often wants fixtures that are quick to re-aim and easy to refocus; a fixed news set can use units that are rigged once and left alone.

• Flicker check at the gallery shutter speed
• Colour stability while dimming
• Fan noise near microphones
• Ease of re-aiming from the floor

Rigging day is slower than clients expect and rightly so. Fixtures go onto the grid with safety bonds, cables are dressed so they cannot swing into a camera shot, and every circuit is labelled at both ends. It is not glamorous, but a clearly labelled rig is what lets someone find a fault in thirty seconds during a rehearsal rather than thirty minutes.

We work from the plot but we adjust to the room, because ceilings are never quite where the drawing says. If a fixture ends up a little lower than planned, we recheck the beam against the camera positions before tightening anything.

Power gets the same care. We spread the load across circuits so one trip cannot take out the key and the fill together, and we leave a margin so the studio can add a fixture later without redoing the distribution.

The control desk is where the plot turns into something a production team can use. Priya programmes it with the people who will actually run it, because a desk that suits the lighting designer may be awkward for a floor manager in a hurry. We build a small set of clear states: the news open, the two-way interview, the wide for a panel, and a plain working light for the crew.

Each state is stored with fade times that look natural on screen. A fast snap between looks can distract viewers, so we usually keep transitions gentle unless a show asks for punch. We also record a safe fallback state, so if a cue is missed during a live programme, the set still looks acceptable.

We write these states down in plain language and leave a short sheet at the desk. New operators should be able to bring up the right look from the sheet without calling anyone.

• Named states for each format the studio runs
• Fade times tested on the monitor
• A fallback look for missed cues
• A printed sheet kept at the desk

The last stage is a session with the camera operators and the gallery. We put a stand-in on the set, sit them in each guest position and check the picture on the gallery monitors rather than trusting our eyes in the room. What looks right standing on the floor often looks different through a lens.

We adjust exposure and balance across the cameras so cutting between them does not make faces jump in brightness or colour. Small moves of a fixture or a few percent on a channel usually settle it, and we note each change on the plot so the drawing matches the room afterwards.

Then we run a short mock programme with the real presenters if we can. Watching someone move naturally, stand up or turn to a second guest shows us things a static stand-in never will, and it is where the final tweaks come from.